再生镁合金表面微弧氧化/水滑石复合膜层的一步法制备及其耐蚀性能研究

张云, 张宇鹏, 董泽华, 张欣欣

One-step Preparation and Corrosion Performance of Micro-arc Oxidation/hydrotalcite Composite Film on Recycled Mg-alloys

ZHANG Yun, ZHANG Yupeng, DONG Zehua, ZHANG Xinxin

表1 不同镁合金表面含LDH膜层的厚度及自腐蚀电流密度对比

Table 1 Comparison of thickness and corrosion current density (Icorr) of LDH contained coating on different Mg-alloys

Coating/Substrate Thickness/ μm Corrosive medium Icorr (Substrate)/ A·cm-2 Icorr (MAO)/ A·cm-2 Icorr (MAO/LDH)/ A·cm-2 Ref. LDH/MAO/AZ31 7.83 Hanks solution 1.28 × 10-5 3.94 × 10-7 6.81 × 10-9 [26] LDH/Anodic-film/AZ31 3.9 3.5%NaCl 1.47 × 10-5 8.08 × 10-6 7.90 × 10-7 [35] LDH/MAO/AZ31 14.2 3.5%NaCl - 6.25 × 10-6 1.02 × 10-7 [36] LDH/MAO/AZ31 8.62 3.5%NaCl 1.20 × 10-5 4.31 × 10-8 4.67 × 10-9 [37] LDH/MAO/AZ31 9.9 3.5%NaCl 1.54 × 10-5 9.89 × 10-6 2.30 × 10-7 [38] LDH/MAO/recycled Mg 2.72 3.5%NaCl 1.12 × 10-4 - 1.79 × 10-7 This work